package com.ezgo.erc.master.filters;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletResponse;

/**
 * 
 * (过滤器)模块 TODO(AJAX跨域访问过滤)
 * 
 * @author devintam
 * @date 2015年9月14日 下午6:20:55
 *
 */
@WebFilter(filterName = "cors", urlPatterns = "/*")
public class SimpleCorsFilter implements Filter {

	@Override
	public void destroy() {

	}

	@Override
	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
		HttpServletResponse response = (HttpServletResponse) res;
		response.setHeader("Access-Control-Allow-Origin", "*");
		response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
		response.setHeader("Access-Control-Max-Age", "3600");
		response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Within");
		chain.doFilter(req, res);
	}

	@Override
	public void init(FilterConfig arg0) throws ServletException {

	}

}
